Filter press



April 1, 1947. s. BARNETT Fnman mass Filed March 4, 1944 4 Sheetg-Sheet1 A Tree/v5) LOUIS. S. BARNETT INVENTOR.

L. s. BARNETT FILTER PRESS Filed March 4, 1944 4 Sheets-Sheet 2 Laws. 5.BARNETT INVEN TOR.

TTOENEY 9 .1 mm m m W M m H u N n n R m v av m n k n gill n n 4 0 L gas}: m a 36 v Q N 0 m N m April 1, 7- L. s. BARNETT FILTER PRESS FiledMarch 4, 1944 4 Sheets-Sheet 3 L. UIS. S. BARNETT Arroezvsv April 1,1947. s. BARNETT FILTER PRES S Filed March 4, 1944 4 Sheets-Sheet 4LOU|5.5.BHRNETT IN V EN TOR.

Arm/army Patented Apr. 1 1947 UNITED STATES PATENT OFFICE PRESS Louis 5.Barnett, Newark, N. J. Application March 4, 1944, Serial No. 525,010

GCIaims.

Other objects will be discerned by one familiar with this type ofapparatus on a reading of the specification taken in connection with theannexed drawings wherein:

Figure 1 is a side elevation, shown somewhat schematically, of theassembled structure.

Figure 2 is a bottom plan view of Figure 1 with of vertical grooves I!and horizontal grooves II to carry down to the bottom portion thereofthe I liquid passing through filtering material to which reference willbe later made. Preferably, the lower adjacent corners have spaces orrecesses I! to receive the liquid coming from the grooves 15 and IS. Thepassage oi the material to be filtered through the structure will belater referred to.

Spaced between the units I, are units it which are hollow, with openingsin their opposite sides It and 20. The tops of the units are providedwith handles 2| for removing the units from their operative position asindicated in Figure 1. It

- will be noted that the fixed units 1 and the removable units l8 areeach formed like the frustum of a pyramid and are located in reverseposicertain parts removed, such as the framework,

drip pan, etc. 1

Figure 3 is an end view of one of the fixed units. Figure 4 is a viewlooking in the'direction of line 4-4 of Figure 3. '5

Figure 5 is a view of Figure 3 looking from right to left.

Figure ,6 is an end view of one of the removable units.

Figure 7 is a view of Figure 6 looking from right to left. i

Figure 8 is an exploded perspective view of one end of the structure.

Figure 9 is a view approximately 9-9 of Figure 10.

Figure 10 is a view on the line III-l0 of Figure 9, with the filterbroken away to show the adjacent surface of the fixed member with whichit is associated.

In the various views, wherein like numbers refer to corresponding parts,I and 2 are end frame membersto which are fastened threaded support rods3 and 4 on opposite ends of the filter units. The rods 3 and l carry, infixed position, a plurality of units, the end units being numbered 5 and6, while the intermediate fixed units are colleetivelynumbered 1. Thends of all of these units are supplied with mounting clips 8, eachhaving a recess 9 to receive the support rods 3. similar clips l0,having orifices ll therein, receive the support rods 4. Nuts l2, carriedonthe rods 3 and 4, are used to clamp the clips ,8 and I0 securely tothe-rods.

The fixed units 1 have the greater portion of their opposite sides Itand II formed as by means tion inthe assembled relation shown in Figure1; that is to say, the frustum of the unit I is at the top, while thefrustum of the unit I8 is at the bottom of the structur the units 7 andI8 are wedge-shaped andthe inclined sides of each unit I are in opposedrelation to the inclined sides of the next adjacent units l8, thenarrower ends of the units l8 and 'I being located, respectively, at thebottom and the top of the structure.

The units i8 are held in firm relationship with the units 1 by means ofturnbuckles 22, the hook portions 23 of which engage eye members 24fastened to the bottom of the units IS. The lower part of eachturnbuckle 22 engages a frame member 25 which may be inthe shape of astiff rod.

on the line i The units It may also be provided on opposite ends withsight members 26 which may be of glass of suitable strength so that anattendant may observe the passage of the slurry through the removableunits l8.

Positioned between the removable units l8 an the fixed units 1, arefilter members 21 made of any suitable material. It will be noted thatthe unit l8 has, on its opposite sides around the opening, sufllcientsurface 28 to constitute a seat for the peripheral edge ofthe filteringmember 21.

Likewise, the peripheral surface 29 of the unit I forms a cooperativeseat similar to 28.

Coming now to the operation of the filter structure, it will be notedthat the slurry or material to be filtered is passed by the pump Sthrough the pipe 30 and is preferably fed to passageways 3| in the fixedunits I by valves 32 and 33, Each of the' filtering members 21 has anopening 34 therein which, when the parts are assembled, is in alignmentwith itsco-operative passageway 3| in the unit I, whereby the slurry ifed to an orifice 35 in the removable units II,

More specifically,

and from this passageway 35 through an opening 36 into the hollowportion of the unit, from which space it passes through the filteringmembers 21 onto the grooved surfaces of the adjacent fixed units.

By means of these grooves, the liquid is passed to the spaces I! at thebottom portion of the fixed units 1, and these spaces are connected bypipes 31 to fittings 38, and by way of the valves 3! to the outlet pipe40, it being understood that the valves ,which are connected to thefittings 38, are at this particular time closed.

When it is desired to wash the filter cake from the grooves l and I6 inthe fixed units 1, the valves 39 are all closed and the valves 4iconnesting the pipes 31 to the wash water discharge pipe III are allopen, together with the valves 42 which control the flow of the washwater from the pipe 44 that is connected'to the wash water pump W intothe top of the fixed units 1 which preferably have recesses or spaces 43to receive the wash water coming from the feed pipe 44 by way oi thevalve 42 into these spaces by means of the passageways 45. From thespaces 43, the wash water is forced through the grooves I 5 and i6 andfinally into the recesses l1 and out through the pipe 3! into thewater-discharge pipe 50.

It is to be understood that when the filtering members 2'! become fouledup so that the washing just described will not clean the filteringmembers, then the turnbuckles 22 are loosened and the units l8 areremoved, together with the filtering members 21, and cleaned. It may beremarked that in the assembly of the structure, the

peripheral edges of the filtering members 21 may; be treated with asealing compound such asv valve 41 to take away any drip collected bythe pan 4' during the operation of the structure or during the washingprocess.

From what has been said, it will be seen that I have provided a filterstructure in which the alternate filter units may be quickly and easilyraiity of units arranged in removed for cleaning and repair purposes,and

because these units are removable, any further cleaning may be performedon the grooved surfaces of the units I if necessary. Moreover, the units1 and: the frames l8 can be removed for repair of the. press, andadditional plates or frames can be inserted, all without stopping thefiltering operation, it being possible to cut off the liquid fiow fromany plate or frame by closing of the proper valves. tinuous operation ofthe press is possible and less plates and frames are necessary for agiven output of filtrate per unit of time.

Also, it will be understood that if desired, certain of the plates maybe constructed without wash-water inlets and may be arrangedin anypreferred relation to the otherplates.

. WhatIclaimis;

1. A filter press including a framework, a pin raiity of wedge-shapedfixed and removable units arranged in alternate relationship on saidframework with the narrow ends of the fixed units and the removableunits facing upwardly and downwardly respectively, each of the removableunits "'havingh frame construction with two opposite Consequently, contoa conveyor.

' movable unit against the fixed units at opposite sides of saidremovable unit with said filtering members tightly clamped between saidunits and for releasing said removable units for removal from the filterpress without disturbing the fixed units, the fixed units havin theiropposite sides formed to receive the liquid from the removable unitsthrough said filtering members, and means fori taking away the filteredliquid from said fixed un ts.

2. A filter structure including a series of units arranged in tandem,the end units and every alternate one being held in a fixed positionwhile the intervening units are removably positioned between the fixedunits, all units having tapered sides presented each 'to the other,those of the removable units tapering inwardly and downwardiy, while thesides of the fixed units taper in reverse direction, filtering memberslocated be tween said units, with means for drawing the removable unitsdownwardly to press the units one against the other with said filteringmembers between them said means also serving to release the removableunits which are provided with means forwithdrawing them from assembledposition after being released, the removable units having formations toreceive slurry and to pass it to said filtering members, slurryconveyors associated with the filter structure, the fixed units havingfittings connected to said slurry conveyors and passages leading fromthe fittings to passages in the removable units for allowing the slurryto move into the receiving formations therein, the fixed units havingrecesses at their lower portions and having grooved faces next to thefiltering members and leading to said recesses to carry the filteredliquid to said recesses, and fittings attached to said lower portion forpassing the liquid 3. IA filter press including a framework. aplutandem, means fixedly mounting the end units and alternate units onsaid framework while the other units are removably positioned betweenthe fixed units, the removable units having two opposite sidesconverging downwardly while two opposite sides of the fixed unitsconverge upwardly, each removable unit having an opening-thereinextending through said two converging sides, filtering members disposedacross the ends of said opening of each removable unit, means fordrawing said movable units downwardly to clamp said filtering membersbetween said sides of each removable unit and the adjacent fixed units,said fixed units having liquid-receiving surfaces overlaid by saidfiltering members and formed to receive liquid from said removable unitsthrough said filtering elements and to conduct such liquid to thebottoms of said fixed units, and said fixed unit having outlet passagesfor such liquid, and means for introducing liquid to be filtered intosaid openings in said removable units.

4. The filter press as defined in claim3 wherein said means forintroducing liquid to be filtered into said openings in said removableunits includes a hole extending through each of the inclined sides ofeach removable unit beyond the ends of said opening in said removableunit and commu'nicating"with said opening intermediate said endsthereof, a passageway in each fixed unit registering with one of saidholes in the removable units when all of said fixed and removable outletpassages of said fixed units, a common dis- 10 charge pipe for washwater having a branch for each of said outlet passages, and valves forselectively causing communication between said outlet passages and saidcommon outlet pipe for filtered liquid or said common discharge pipe forwash water.

6. The filter press as defined in claim 1 wherein each removable unithas a window positioned to permit observation of the space within saidremovable unit.

- LOUIS S. BARNETI.

B i REFERENCES CITED The following references are of record in the fileof this patent:

UNITED STATES PATENTS Number Name 1 Date 862,286 Scoenfeld Aug. 6, 1907209,874 Enzinger Nov. 12, 1878 393,633 Enzinger Nov. 2'7, 1888 2,293,120De Lisle Aug. 18, 1942 FOREIGN PATENTS Number Country Date 629,402French July 5, 1927 422,861 French Jan. 31, 1911 489,860 British Aug. 4,1938 512,972 British Sept. 29, 1939

